Fiber concrete for the construction of fireproof buildings.



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UNITED STATES PATENT OFFICE.

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GUSTAF BOSENLEAF, OF GRAND FORKS, NORTH DAKOTA.

FBER CONCRETE FOR THE CONSTB'UCTION OF FIBEPBOOIE BUILDINGS.

No Drawing.

Specification of Letters Patent.

Application filed March 11, 1907. Serial No. 361,778.

Patented Oct. 26, 1909.

.. ingrthe same.

"4 cgpper and Eulfate amgnium in tlie proportions of poun s o su ate ammonium he object of the invention is to provide a fiber, cement or concrete especially designed for use in the construction of walls, artitions and other portions of fire-proof uildings, which will effectually withstand the action of the elements for an indefinite eriod without danger of cracking, crumling or otherwise disintegrating.

The invention consists in taking vegetable "fiber, preferably flax straw and reducing the ihdividual fibersTo'r'latively short lengths and subsequently combining therewith a solution consisting of sulfate of copper sulfate of ammonium, lime and a small propdftioh of or cement or clay.

In carrying theprocedure into effect the flax straw r fiber is placed in a suitable maclime and chopped or ground until the individual fibers are approximately one-half an inchinlength. Aquantit ofHme, referably on'e barrel of the sameYis en sl ii d in a separate box or receptacle and en cient water .added thereto to roduce a solution avmg the consistency 0 thin white wash, after which one and one-half bushels of wet cla are added thereto and the mixture oughly stirred or agitated until the several parts are well blended. The sulfate to 2 pounds of the sulfate of co per are then dissolved in a sma quantity 0 and the same added to the lime so u 1011 an thoroughly incorporated therewith referably by stirring or agitating the li ui The liquid preparation is then sprinkle over the fiber in the receptacle and the contents of the latter thoroughly mixed by shoveling the same with a fork or other suitable tool until the liquid pre aration is thoroughly incorporated with t e fiber or flag; straw, thus forming a sticky pmss dfsiifii- 5 cient consistency to prevent the same from slopping. When Portland cement is substituted for the c ay, equa pa 5 of clean fine and figtlan cement sa one and 9. ga ushels o eac iare IIlmxe together an incor orated with t e g oppediber or flax straw after the liquid so utlon has been added thereto and the several parts mixed in the manner before stated. The prepara tion is then removed from the box and used immediately in order to prevent the cement from setting, additional ohggpiedfitw or fiber being subsequently intro ace in the box and treaied'in the manner before stated.

In using the concrete or plastic compound for making partitions or walls for frame buildings and similar structures, sultable stri s or laths are secured to the vertical stu s of the partition or wall on the inside and outside thereof, said studs being pref- A of the vertical studs and in contact with the strips or laths so as to form an intermediate chamber or compartment for the rece tion of the cement or plastic compound, the atter Y being thoroughly tam ed in any well known manner. As the we progresses in height the planks or boards are removed and placed in position above the finished portion of said wall and additional cement introduced in the compartment formed by the boards and tamped in the manner before described, the operation being continued until the wall or partition is completed. The laths or strips are then removed or detached from the studding and the recesses formed by said laths filled in with the plastic compound so as to present a smooth exterior surface on both the inside and outside of the wall and at the same time form a fireproof housing or casing for the studs. The exterior of the wall 1s then preferably coated with a sol tion of silicate of ss and u sequent y covere a t in ayer of Portland cement mixed with fine sharp sand.

If desired a suitable ,pigegnt may be incorporated with the cement rming the exterior coat' -of the wall so as to give the same the desired tint or color, and said exterior coat' may be molded or troweled in any fanc' l shapes or designs so as to give the exterior wall an ornamental appearance. 7

When the fiber cement or concrete is used in the construction of out-houses, stables and other inferior buildings, the clay is preferably incorporated with the ingredients, but when used for constructing dwelling houses, ofiice' build' s and other fire-proof structures Portlziii d cement is substituted for the 5 clay.

While it is preferred to use flax straw as one of the ingredients of the compound it will of course be understood that swam shreded orn stal a he the setting of the cement in order to allow it properly to be worked. By employing the proportions stated. of the two sulfates, both of these objects are attained. 'llhesulfate of ammonium acts as a zgtarder while e su ate 0 co pr acts as a agent; I lie properties of the lime, lPortland crfient, sand and water are well known, be- .1ng ingredients common to many cements.

A cement or concrete formed 1n the manfrost and moisture proof to a high degree, and when used for constructing the walls of buildings will successfully resist the deteriorating action of the elements for an indefinite period without danger of cracking, crumbling or otherwise disintegrating.

Having thus described the invention what is claimed is:

1. A concrete consisting of comminuted vegetable fiber, a binder, slaked lime, and sulfate of copper and of ammonium, substantially in t e proportions specified.

2. The herein described concrete comprising comminuted vegetable fiber, sulfate of ammonium four pounds, sulfate of copper two pounds, lime one barrel, Portland cement and clean sand of each one and a half bushels, and water.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

GUSTAF ROSENLEAF.

Witnesses:

THos. L. Lawson,

ner described is strong and tough, and fire, C. L. GRABER.

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